66641243273 has 8 divisors (see below), whose sum is σ = 73271976960. Its totient is φ = 60105916080.

The previous prime is 66641243267. The next prime is 66641243281. The reversal of 66641243273 is 37234214666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66641243273 - 2⁶ = 66641243209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66641243233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23850158 + ... + 23852951.

It is an arithmetic number, because the mean of its divisors is an integer number (9158997120).

Almost surely, 2^66641243273 is an apocalyptic number.

It is an amenable number.

66641243273 is a deficient number, since it is larger than the sum of its proper divisors (6630733687).

66641243273 is a wasteful number, since it uses less digits than its factorization.

66641243273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47703247.

The product of its digits is 870912, while the sum is 44.

The spelling of 66641243273 in words is "sixty-six billion, six hundred forty-one million, two hundred forty-three thousand, two hundred seventy-three".